I am very keen to explore/understand if there is some data/information on the relatively slow rollout of various variants of COVID-19 vaccines. Is this just the production or supply issues OR there are larger issues related to the efficacy of different vaccines, individuals preference for the specific vaccine, and its availability issues, crowding and lack of proper arrangements at the vaccination centers, concerns related to vaccines, and side effects management, drop-out ratio from the first dose to subsequent dose and reasons for such dropouts, etc?